Editor: Introduce a dynamic filter for the content of a single block:

`render_block_{$this->name}`

This complements the existing `render_block` hook and allows for filtering the content of a specific block without having to use conditionals inside the filter callback.

Props manzoorwani.jk, noisysocks, birgire, johnbillion.
Fixes #46187.
Built from https://develop.svn.wordpress.org/trunk@50123


git-svn-id: http://core.svn.wordpress.org/trunk@49802 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/class-wp-block.php

@@ -241,7 +241,22 @@ class WP_Block {
 		 * @param string $block_content The block content about to be appended.
 		 * @param array  $block         The full block, including name and attributes.
 		 */
-		return apply_filters( 'render_block', $block_content, $this->parsed_block );
+		$block_content = apply_filters( 'render_block', $block_content, $this->parsed_block );
+
+		/**
+		 * Filters the content of a single block.
+		 *
+		 * The dynamic portion of the hook name, `$name`, refers to
+		 * the block name, e.g. "core/paragraph".
+		 *
+		 * @since 5.7.0
+		 *
+		 * @param string $block_content The block content about to be appended.
+		 * @param array  $block         The full block, including name and attributes.
+		 */
+		$block_content = apply_filters( "render_block_{$this->name}", $block_content, $this->parsed_block );
+
+		return $block_content;
 	}
 
 }

wp-includes/version.php

@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.7-alpha-50122';
+$wp_version = '5.7-alpha-50123';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.